1) how much does ravi piaggio assembly , starter , fuel guage costs?
by assembly you mean handle bar control panels? they cost 1800 for a pair. fuel guage you can use the one that comes on honda deluxe.
2) i am the second owner jis se li thi usne modify ki wi thi puri including light , handle , rim size. so i changed the handle and light to original one. ab low main normal halogen hai aur high main hid. bike mere pas khari thi main use nahi karta tha tou sab cheezein chalna bund hogai thi tou main ne wiring waghaira sab refresh karwai puri , ab jab yeh sab hua uskey 2 din baad HID fluctuate hui aur bund hogai.light support nai kar rai ya kia? aur jo first owner ne light lagai thi us main light bht spread hoti thi aur jo original hai us main HID bht dim se thi.
Go to auraganzeb market and find taiwan made xanadu round beam. actually that is made for cb250 but fits on piaggio. it is with glass lens and stell reflector and 100watt h4 halogen so excellent beam and focus. Get rid of hid.
3)abhi jo first owner ne assembly change kar k lagwai thi wo fit nai hain aur accelerate kartay wey race atak jati hai. bike ka pick bhi kam hai. dou mahinay se tuning nahi hui. please suggest me which oil and plug to use.
Change the control panel along with race cable.
4) beech main disc brake ka oil khatam hogaya tha tou main ne dalwaya abhi aur dalwanay k baad se jab bike chalti hai tou 'khisak khisak' awaz ati hai.
Not sure of this issue.
5)aur peeche wala rim size 18 hai aur agr brake tight karwaon tou skid karti hai.
Not sure about it as well.